26
for testing again.
4.9.
PS2 Scanner cannot Scan
Causal analysis and resolution:
（
1
）
Check the status of scanner ;
（
2
）
Check if PS2 connector inserted in right place, push hard when you try to insert it.;
（
3
）
PS2 socket may contacts poor after being used for a long time, please change a new PS2 socket;
（
4
）
Check if the big cable between the communication board and the mainboard looses or drops;
（
5
）
It may be the problem of communication board or circuit abnormalities of mainboard. Please
change a new communication board for testing, if it still doesn’t work, change a new mainboard
for testing again.
4.10.
Telephone cannot be Used
Causal analysis and resolution:
（
1
）
Check the status of telephone
（
2
）
Check if the 6pin crystal connector of telephone becomes oxidized or dirty;
（
3
）
Check if the 6pin socket becomes oxidized , dirty or out of shape;
（
4
）
Check if the big cable between the communication board and the mainboard looses or drops;
（
5
）
It may be the problem of communication board or circuit abnormalities of mainboard. Please
change a new communication board for testing, if it still doesn’t work, change a new mainboard
for testing again.
4.11.
Password Keyboard and Connector cannot be Used
4.12.
Causal analysis and resolution:
（
1
）
check the status of keyboard
（
2
）
Check if the 6pin crystal connector becomes oxidized or dirty;
（
3
）
Check if the 6pin socket becomes oxidized , dirty or out of shape;
（
4
）
Check if the big cable between the communication board and the mainboard looses or drops;
（
5
）
It may be the problem of communication board or circuit abnormalities of mainboard. Please
change a new communication board for testing, if it still doesn’t work, change a new mainboard
for testing again.
4.13.
Cannot Open the Drawer
Causal analysis and resolution:
